Re:
A somewhat sad, and all too common, story ... hope you have good luck in finding a replacement bike! There's likely a few people on here, who for whatever reasons are working to replace a long-lost bike (or dream bike) ... so you have come to the right place.
Keep and eye open on Craigs List, e-bay, the for sale forum on here ... and keeping chatting it up on this thread; and soon enough you will find a frame (bike?) with which to begin your journey of re-creating the exact bike you want to have today (be it exactly like it was all those years ago; or even better.
One warning though, it can take years to find all the exactly correct bits and parts, if you have a set build/spec list in mind.
Cheers, and good luck!