Wayne did have 1 LE left earlier in the year. It might be best to contact him directly to see if he has one.

As far as the difference I did a quick search of PPS's FAQ and it yielded this result:

Q: What is the difference between MMR Limited Edition (LE) and MMR Standard (STD)
A: The Differences Are:
LIMITED EDITION (LE)
Includes Shaker Motor
Gold or Black or Silver Trim
Double Playfield Hard Coat
Limited to 1000 Games
Game # & Plaque
Finished Backbox Edges
Plywood Bottom (stronger more solid)

STANDARD (STD)
Shaker Motor at optional Cost
Silver Trim
Double Playfield Hard Coat (this was a change for STD)
Not Limited
No Game # or Plaque
Unfinished (as original) backbox Edges
Original MDF Bottom

Guess that's why pro and le were offered at the same price point. $150 shaker motor is the only true value add. I would prefer black le, followed by silver pro or le. Both choices over the gold le. Although, I wouldn't kick lady mustard out of bed for eating crackers.