FYI, these guys have 3/16" barbs stems ($1.05/ea) for 1/4" MFL disconnects. No online ordering, you have to call it in, but they have a large selection of uncommon kegging/distribution parts.
The Beverage Equipment Companies
1-804-796-9507
9am-5pm Eastern
http://www.beverageequipmentco.com
Specifically on the barb stems:
http://www.beverageequipmentco.com/BEC_Stainless_Steel_fittings_tubing.htm
The Beverage Equipment Companies
1-804-796-9507
9am-5pm Eastern
http://www.beverageequipmentco.com
Specifically on the barb stems:
http://www.beverageequipmentco.com/BEC_Stainless_Steel_fittings_tubing.htm