I have a '95 Sunnybrook 26' TT that DW and I picked up Labor Day weekend. We love it. It's in great shape, and it is perfect for our family right now. The seller only had one key for the entry door...
I have made several sets of keys for a number of trailers and alwayse had good luck at local hardwear stores for most locks and key shops for the rest. Unless the key is stamped "do not duplicate " which is rare for a trailer