Alex - Ok! Here's the poop. To cover a 5"x13" shell you need a piece 4 3/4"x 42" (13 x 3.14 = 41.80 + overlap) I can get two 4 3/4" x 21" pieces out of the remnanant that I have. That'll do the drum.
Instead of locating a single seam under a lug on the back of the shell opposite the badge, you'll have two seams, (Badge/12 o'clock,) with seams under the nearest lugs to the; 3 o'clock and 9 o'clock position on the shell. You'll only have a small amount of overlap at each end/seam. Just make sure that the top flap of the seam falls -dead center- over the holes for the lug. That way, when you put the tension rods in, the seams will be directly behind the rods... essentially rendering the seams invisible. Even though the drum will have two pieces of wrap, no one will ever be able to see them. It'll look great.
Listen man, this is a discontinued wrap, I have no clue what a fair price is for the pieces I have. Tell me what you had budgeted for it, make me an offer. We'll go from there. Honest, I wouldn't know what to ask for, so I'm leaving it up to you to make me a fair offer. (Keeping in mind that this is the last piece of this stuff on the planet! lol - )
I was glad to find the piece of wrap for your drum and even more pleased that it's large enough to do the job. Let's, Git'-R-Done!
John