I assume from your post - these parts no longer available from Felt? I actually need a base bar also.

Not much help here, but I got lucky and found one on Ebay a year ago when I had to replace my IA1 basebar. Had to go with a 44cm over the stock 42cm, but it was worth it. Worth keeping your eyes there as well.

Link to that seller's page incase they come across another: https://www.ebay.com/str/bikesaresofun

Appreciate the help, thanks!

I reached out to them, no answer yet.

Bump, still looking!