Hi, If you go to www.ebay.com and in the advanced search tab at the top, put in the number below in the box and hit the search button.Would this be the shield bottom left that looks like the one in your picture?
330146563931 or one in this one 190129117402
Also, it looks like there is a new book out about Army patches.You might try your local library or book store. It's called....
US Army Patches Flashes and Ovals: An Illustrated Encyclopedia of Cloth Unit Insignia by Barry Jason Stein.It has 3600 designs in it.EEK!!!That's a lot.
And another book
US ARMY PATCHES 1st to 40th DIVISIONS and Related Insignia from WWI - Korea - 1st Division to 40th Division by William Keller
If you can get it scanned, please send it to me too at the address below and I will keep watch for it.