I've come to really like the chainring guard on my Schwinn Sports Tourer with Spécialités T.A. Cyclotouriste Pro 5 Vis crankset and am wondering,

where I can find something similar for other bikes, I'd like something for 130 BCD and 54T (a Shimano 600), that uses the existing bolt holes.

The T.A. seems to have special holes for the guard and chainring separator.