JW,, most stores or online stores have a "wish list" deal..
you pick out several items and email the wish list to your wife,,, then she can buy you stuff you actually want and will use... That is how I do it,,, last year I got a Quick Fuel 850 Carb, a bench grinder....
With the wish list the "non automotive" purchasers can get you parts or tools that you pre select.
I use Northern Tool, Harbor Freight, Sears/Craftsman, Jegs, Summit, etc,,, and for more specific parts I email her the exact part number, the phone number , the price and who to talk to for places that don't have wish lists... like CV Products and other performance parts distributors etc..
Charles