Just to warn you, spring designs get trashed pretty quickly unless you're careful, so the majority of the time it's kinda pointless. You'll need a good thick layer of clear tape for protection of them if you want them to last more than a few weeks
Myself, a couple of the welsh bockers and a few other people got transfers for our springs for capital bocking. We did the Welshy's in July when I was up there, by the time I saw them again at Capital Bocking in August, they were all wrecked and barely readable. I put mine on the day before CB, and I think mine are the only ones still going as I covered mine with 3 layers of clear tape.