I need to find a replacement evaporator coil for a Borg Warner heater/ac unit, model M1UF032AA. Other numbers on the tag are File: LR49965 and 409G. The ac runs and cools but the water collection frame leaks. Any ideas about finding something equivalent? Thanks.

From the looks of your model number I would say it is a 2 1/2 ton unit. I take it this is a fairly ould unit. At this point is is going to be more of just finding a coil that will fit. As long as it is the same tonnage as the outdoor unit. They also make sprays and adhesives that you can patch your old drain pan with.

Might be a part here

hot air furnances (http://cnj.craigslist.org/for/1213907775.html)

Epoxy works in some cases or just going to a local sheetmetal shop and have a new collection frame made and fitted to the old coil.