Well, you can find replacements for the lighter ones on eBay, being made new (actually, I reckon this guy had a big box of them made up and he is still selling from that box):-
http://cgi.ebay.com/Twilight-Zone-Pinball-POWER-BALL-new-SALE-$35-powerball_W0QQitemZ140303421474QQcmdZViewItemQQimsxZ20090223?IMSfp=TL090223131012r30698
Depends on how much you want to pay, I guess.
Well according to Wayne, the part number for the powerball that he sold me is 20-9809, which is exactly the same part number listed in that eBay auction. As stated in the listing, "This ball is produced to the exact same specifications, weight and size as the original and will last just as long as an original one" but that still doesn't tell me whether the "original" powerball referred to is actually 20-9809 or 20-9809-1. Since the eBay ad is for a replacement, I think it is more likely to be the same ball that I have rather than the lighter, smaller one I am looking for.
Matthew
Have you weighed the powerball and a normal pinball? The powerball should be about 20% lighter. The eBay ad highlighted above does mention that the product being sold: "is a specially made ceramic ball that is lighter than the regular steel balls." So you would need to know whether the powerball you have purchased is lighter or not. I haven't read anywhere that states the powerball is smaller.
Pinball Life (
http://www.pinballlife.com/index.php?p=product&id=1293&parent=49):
> White zirconia ceramic "Power Ball" used in Bally's Twilight Zone pinball machine.
>
> New production bright white pearlescent color (as original). Conforms to the original size and weight specifications: size - 1-1/16" diameter, weight - 65 grams.
>
> Bally reference #20-9809.
Normal pinball is around 81 grams.
See also
http://www.marcospecialties.com/storeitems.asp?cc=PFLD-PINBALLS - it says the same thing.
I couldn't find any matches for 20-9809-1
