Johnny played a few shows in Colorado in 1990 and I managed to see two shows in three nights. Here's the first, pretty decent sound quality, interesting set list.
This is another dreaded Hi-Fi VHS transfer from the master, as you can hear some VHS noise from time to time - check the sample

***** 44 khz / 16 bit version ***** (CD Version)

Here's the second show in three nights. This recording came out better than the Boulder show, but the VHS noise is worse on this one. I don't think the master recordings are ever going to surface, so this is about as good as it gets for these shows. Check the sample

Johnny Winter
September 29, 1990 (1990-09-29)
Armstrong Hall
Colorado College
Colorado Springs, Colorado

01.[09:03] Sen-sa-shun
02.[06:54] You're Humbuggin Me
03.[07:07] Don't Take Advantage of Me
05.[13:41] Mojo Boogie
06.[04:38] Johnny B Goode
07.[03:34] Wildwood Flower
08.[13:25] Kind-Hearted Woman
09.[04:18] It's All Over Now

Total 1:16:07

Lineage: unknown Aiwa stereo hand-held mic > Sony D6 > Hi-Fi VHS
Transfer: JVC HRXVC11A > Zoom Hn4 (96-24) > Wavelab (tracking and tweaking) > Flac (level 8) > you !