Where could I get an assortment of spice shaker tops?

[zmgmeister.livejournal.com]

I have a number of spices where they either came in a nice bottle but lack a shaker top, or they came in a plastic bottle and after frequent use the shaker top keeps getting caught inside the cap when you open it.

It occurs to me that if these screw-tops are in a few standard sizes, there ought to be a kit somewhere where you could get some nice stainless tops to replace the stock lids with. ( I could just get a nice set of glass shakers but don't relish the idea of doing a "spice transplant" )