suggestions where to buy walker with seat?

Go to your doctor. Have him writhe a Rx. You can get it via your insurance. You may be given a catalog by your doctor or medical supply to choose the one you want.

Funeral homes generally have a bunch of this type equipment. If you have a VFW / Eagles post near you, they often have a selection too.

I picked up a real nice one for a friend at Walmart,DR wrote a script I picked it up at their Pharmacy.

Bought a nice one for my mom at Riteaid. I think it was $100

Craigs list, Facebook Marketplace.

X2, wra.

If you are going to be using it outdoors make sure you get one with the larger wheels as the ones with smaller wheels don't work too well in rough terrain.