[ccp4bb] source for forceps/clamps that fit around cryovials

[Bryan W. Lepore]

could anyone drop the name of a source for those tweezer-like clamps whose 
ends fit perfectly around a Nunc/CryoCap cryovial?  one very famous source 
seems not to have them.

these are not the locking clamps or thick metal tongs, but are more like 
tweezers with the ends curved into half-circles on each arm.

-bryan