1995 V21 deck drains

[Redneck]

I just got my 93 V-21 home and need to do the deck drains as well. Were did you find the check valves they must be the inline type or did you find a set of through hulls with a ball float type set up in them. The ball assembly would be the better of the two and the only one I have been able to find are the sculpers that are a bit bigger in diameter and the outlet is 1 1/2". you just have to do some minor mods to make them work I would like to leave the boat alone and not cut it up any one out there find some the same size???