Revell-Monogram released a very well publicised PBY-5 into their Promodeler range about 5 years ago, I believe they followed it up with a PBY-5A not long after.
By all accounts (including an FSM kit review) it was a great kit that was in need of very little aftermarket add ons.
Its been a while since I've seen either kit on hobby store shelves, but I can't see a reason why it wouldnt be re-issued somewhere down the road.
There were also at least a couple of aftermarket resin conversion sets made for it by the Canadian firm, Belcher Bits.
I'm sure those 1/48 cats are out there for you to find somewhere
Good luck!