Help! 2004 Bigfoot 2500 TC Advice

Hi everyone! My husband and I just purchased a 2004 Bigfoot2500 10.5E truck camper and we’ve spent hours upon hours trying to source parts for it. It’s certainly harder then anticipated but we really want to make sure we’re doing right by our old school Bigfooot. Theres a few things we’ve haven’t been able to find and we’d would love any information/insight.

1. Kitchen sink plastic drain stoppers. We have a split acrylic (I think?) sink. Theres a beige plastic stopper in each drain that seem screw down into the drain in order to plug it. Ours our deteriorating and for now we’re trying to find replacements if anyone knows where to get them.
We’re debating replacing the entire sink as well at some point so if anyone has some insight with links to replacement sinks or how big of a job that would be. The more info the better

2. Exterior range hooded vent cover. Ours is cracking and discolored on the outside and we can’t find a similar one that fits. Apparently the only one we can order from Bigfoot is too large and we’d have to cut the hole in the fiberglass bigger (certainly trying to avoid that lol).

3. Replacing the mattress. We ordered a new foam mattress from Amazon (6 inches like the original). Although, I really like the quality of the mattress cover on the original and was wondering if anyone ever replaced the original insert with a foam mattress to keep the cover? Also, are the cushion upholstery and mattress cover that come in these older Bigfoots machine washable?

4. Monitor panel on power range hood. All of the connections, lights for tank levels and switches function properly but the rubber boarder on panel itself seems to be pulling away from the metal hood. Is there a way to replace the entire strip/mount around the switches? I know that panel itself is delicate so before we go taking it apart is this a “dont fix what’s not broken” situation?

5. Exterior door metal lock. It’s always sticking and hard to close without using force. Any links to a good replacement would be helpful.

6. Wet bath shower curtain track. Looking the replace the entire track since the little clasps attached to it are rusty and one on the end is stuck in place. I can’t seem to find the replacement anywhere. Or is there a product to apply to get the rust off without compromising the fiberglass?

7. Replacement exterior little door locks. A lot of them are a pain to unlock with the key and they stick. Has anyone ever bought them in bulk and replaced them all? Or is there a way to clean them out or a specific lubricant to get them to function better?

I know the list is long but if anyone has any tips, links to replacement products, ideas just any insight at all it would be so so so helpful. My Bigfoot did come with an owners manual but it’s a bit vague and a lot of the individual manuals they reference for more information we don’t have. I added a picture of the information inside of the closet incase anyone happens to be familiar with our model or own the same one.

Thanks everyone!