From all the research I've done, lesterpaul must be right.. I did find a 1993 Les paul (signature) as they call it, pickguard signed by les, on ebay for sale today that looks just like it.. ha , they are asking 5400 but it has a custom shop logo on the back of the neck, but other than that its dead on to mine. But I think mine is just a LPC plus or premium plus.
I've just replaced the pickups with the gibson classic 57 and classic 57 plus and I'm going to buy all new Gibson gold hardware.. for the bridge and stop and change the knobs to the Gibson 60's black top hat with gold incerts.
I thought about changing all the plastic pu rings and switch plate and knobs to the cream and gold.. but might not look that good on a custom. I haven't owned a LPC for about 15 years, I've been playing strats, This guitars tone and playabilty and looks has made me a Gibson man again.. It just dont feel the same playing a strat now.