Looking for an adjustable height bed rack for B2200. Having a bit of trouble finding them. Are there racks from other model trucks that will work even if slight modification is needed?

 

Compact trucks haven't been sold in USA for quite a few years now. So things like bed racks and cross-bed tool boxes for them are likely no longer made. So I think you'll need to cut down and modify a typical bed rack.
https://www.harborfreight.com/automo...uck-racks.html