It is already a collectors item. The stock is a Gary Goudy designed laminate made by Fajen, used on guns made before 1996. The internals have a different spring, seal and guide. The trigger guard is machined and blued. Standard on the Laser, it was also an option sold by Beeman for nearly $90. In .22 with 14.3 gr pellets, it will do a bit over 800, in .177 with 7.9 gr pellets it should shoot pretty close to 1000 fps. I have seen tuned .177 Lasers that would shoot 11.6 gr pellets in the mid 900s.
Replacement parts are no longer available from Beeman, best bet is the JM kit. Repairing the stock might be a bit tricky as its a laminate. Many traditional finishes are oil based, and sometimes those oils attack the glue holding the laminates together. If you are considering restoring the stock it might be a good idea to consult with someone who knows about working with laminates.