Just piled up a 5 speed in my 90 Flh~What am i lookin at to upgrad to a 6 speed ya think ?$$
33101-03A is the six speed gear set from HD. About $2100 full MSRP. Fits 1990 to 2000. Because of the fitment not a real commonly sold item anymore. That may be to your benefit.
Get your local parts counter to hop on HD-Net and see what dealerships have old stock. Find someone who has had a high dollar gear set on the shelf for a long time and talk them down a bit. I got the same gear set you need for my 2000 SERG. Scored it on eBay for $950 if I remember correctly. Some dealer listed it as old open box inventory and no one else bid.
Just checked out in the garage for the five speed gear set that came out of the SERG. It would have got you going again. Didn't find it though. Must have given it away to someone else already
. If I find it will post here.