I think I might have a IMG 5 putter somewhere in my attic. I'll look for it whenever I feel like going up there. Bought it from a local golf club pro about 20-25 years ago.
BTW, I needed to take couple items up there so I looked. Can't find it yet as it's pretty dark. I did find few oldies, MacGregor w/Jack Nicklaus on heel sole and GeoLow600 on the toe end of the sole. I can't remember where I got it but I know it's about 25 years ago. Original Ping 1A putter with black label on shaft, 85029 zip code. Original "Pro Only" grip on it with Ping name on the cap. Also one good oldie that Johnny Miller the d-bag actually used once, Oriziba Basakwerd putter. That was the only reason that I bought it is because JM used it on PGA Tour long time ago.
I'd like to know more about that MacGregor putter w/GeoLow600 on the sole. I do have early-mid 1930 brass MacGregor putter w/hickory shaft somewhere in my other room.