AC condenser options

[webfoot]

I have an AC truck but all the AC stuff outside the firewall box is gone. I pretty much have all of the replacement stuff figured out, except the condenser. I am assuming the specifics of each unit depend on where the holes are for the plumbing to go through the core support, and each one is a bit different size depending on how much cab the AC has to cool.

I have seen ones specifically for my truck for $275 or so. I can get a spectra for $116 right now. This is for early 80s trucks and is 25.75" by 15.56" by 1" thick. #8 inlet and #6 outlet connections.

That being said, is there a later model (i.e., less expensive) condenser I can buy that will fit? I can make my own brackets so that is not an issue.