If you have the time to wait for shims, I'd recommend buying the individual ones you need instead of a whole kit. It's a lot cheaper, then only downside is the waiting time involved, since you have to measure your existing shims before you know which ones to order.
I purchased from
https://procycle.us/hotcams/valve_shims.htm
Scroll down to the refill packs, it's $6 for a pack of 5 shims, I only needed 3 different sizes for my adjustment, $18 instead of $80+.
Of course if you ride year round, you might not be able to spare the time, I don't ride in the winter, so it wasn't a problem for me.