Spit,
The square and quad don't come in metric sizes or in 1/4" OD that are any thinner than 1/16". I couldn't find any round 1/4" OD o-rings that were 1/32" thick, but I did find one metric o-ring that is 6.5mm (.256") OD that has a 4.5mm (.177") ID and is 1mm (.0395") thick that might work. $2.85 for 100 pcs.
http://www.mcmaster.com/#9262k611/=2aj7nq
The square and quad don't come in metric sizes or in 1/4" OD that are any thinner than 1/16". I couldn't find any round 1/4" OD o-rings that were 1/32" thick, but I did find one metric o-ring that is 6.5mm (.256") OD that has a 4.5mm (.177") ID and is 1mm (.0395") thick that might work. $2.85 for 100 pcs.
http://www.mcmaster.com/#9262k611/=2aj7nq