Need a #5 jack or similar cheap but working...

Right now I have two planes:

Old Street Smoother and a 48mm Kanna

I’ve run into the problem of needing planes to do the jobs they are designed for (i.e. trying, jointing, take chunks of wood to get something closer to square fast such as a scrub or jack). I’ve got an Old Street jack and try plane on order and will gladly wait the time for them (6 months).

I set the kanna to work like a block plane for me taking almost moxon toilet paper sized shavings and it did ok. However, that won’t be idea for the middle term I don’t believe.

However, I need something like a jack for in the intermediate. I’ve been hesitant to get something of ebay because I don’t know what to look for and what right would look like when I got it if I had to fix something.

I bet the plentiful Stanley #5 in the used market would serve me well. Where’s a good place to get one fairly inexpensively but I can be guaranteed it won’t be an unfixable paper weight?

Other options for what I need?

BTW, I’m not opposed to wooden stock or transitional with the same needs to work requirement.

TIA
Tony

-- Wood is not velveeta