Cap,
A quick and very cheap solution which you probably have just lying around house or garage.
Use a couple metal corner brackets like below, you can get different sizes,shapes & colors.
Mintcraft CB-B01-C43L 1 Inch Corner Braces
simply mount them on tag,
hold up to undertail,
adjust angle to where you like it,(bend brackets to where you want/need them if needed)
put couple holes in undertail to mount brackets,
mount with couple 1/4" round head bolts/lock nuts and wala.
All mounted for less than $3 and a 1/2 hr's time.
And if you want you can sand/grind edges rounded and/or spray paint the to match bike color or whatever you want. And in the end you get the same as you would spending $50-75 for the so called custom fender eliminator kits.
Pretty much the same as Blanca's post up above I just clicked on. Very simple, I never got why anyone would spend all that money for a cheap little stamped out piece of metal to do the same thing as either of these do.