KC,
If you are not in a big rush to replace your forearm,
Watch the 'store' section of e-bay that is listed underneath the general auction part of "browning auto-5". Often dealers list multiple browning items including forearms. Track the dealer down and give them a call. If they have several used, intact, forearms, they should be willing to let you mail them your butt stock so they can try and match the color. You will still probably need to match the finish yourself -- which isn't too difficult to do.
good luck
If you are not in a big rush to replace your forearm,
Watch the 'store' section of e-bay that is listed underneath the general auction part of "browning auto-5". Often dealers list multiple browning items including forearms. Track the dealer down and give them a call. If they have several used, intact, forearms, they should be willing to let you mail them your butt stock so they can try and match the color. You will still probably need to match the finish yourself -- which isn't too difficult to do.
good luck