Let's do the math, just in case I screw up, others can double check.
AN3 rivet diameter = .09375
1.5x diam. = .140
.032 + .032 + (.09375 x 1.5) = .204
AN3-3 = .1875 - .064 = .1235
AN3-3.5 = .2187 - .064 = .1391 looks like a winner....
AN3-4 = .250 - .064 = .186
I would be tempted to try the -3 and see if the shop head will pass. Often dimpled holes will be slightly oversized. At 1.5d protrusion, you might find some cleating over. The -3, which is slightly less than 1.5d protrusion would be easier to set.