generation one weapons for classics/universe?

i was looking on ebay the other day while i was trying to find a classic sideswipe and noticed that someone had generation one weapons for these, don't rememer the sellers name and the auctions he had are already over with. does anyone know anything about these upgrades for like sideswipe, jazz, tracks? on maybe where to find them or who is making them? would love to have more authentic looking weapons for those characters instead of what they got now 
