[jocko]

yes, 16" wheels with correct 8 lug 6.5 bc will work. Just have to make sure you use 16" tires, not the 16.5s you have. I'm not tracking your "odd" tire rim problem(?) Don't you currently have all 16.5 gear?

If you have 16.5 tires you want to save and reuse, then you just need a 16.5x8.25 rims - note there is only ONE of those in the recent list you linked. The rest are either 9.75s or are for a different bolt circle/lug count.

If your tires are shot - then you have two choices:
1) get the 16.5 rims you want (sounds like you don't want the wagons anymore) (8.25 or 9.75) and new 16.5 tires (of appropriate size for the rims). 9.75 rims if you're moving to bigger tires. Check chart provided above.

2) get new 16" wheels (with 8 lug x 6.5 bc) and 16" tires. Your tire selection will be greater (but there are several 16.5 tire options still available if that's what you really want).

EDIT: BTW, the answer to your question in post 1 is YES, now that you've changed the link. The pic is of a 5 lug, but that's just depicted for a style, the wheels listed are correct lug and bc for your current 16.5 tires. Also, if you're ditching your current wheels AND tires, I'd personally switch to 16" wheels and tires all the way around, spare included. 16.5 tires aren't hard to find today (my opinion), but they will likely become more difficult to find over time and 16s probably won't.