Ken,
I have found the following in "Spearheading D-Day, American Special Units in Nirmandy", by Jonathon Gawne, Historie & Collections Press.
The three first wave tank battalions: 70th (8th INF Regt, 4th ID), 741st (16th INF Regt, 1st ID) and 743rd INF Regt, 29th ID), each had two medium DD tank companies and one standard (with deep wading equipment) tank company and one company of M5. Each of the three standard tank companies had 16 gun tanks, one 105mm howitzer tank and eight dozer tanks. The dozer tanks had crews made up of teo tankers (TC & gunner) and three combat engineers from engineer light equipment companies.
The three standard tank companies and number of dozer tanks to get ashore are as follows:
C/70th Armor - four made it on the beach, two sunk with LCT, two returned to England with damaged LCT
A/741st Armor - seven tank dozers made it onto Omaha.
B/743rd Armor - some made it, but no number available.
I do not have any bumper numbers for the 8 additional tanks, but do have partial bumper numbers for the battalions:
Right front left front
1A-70(triangle) C-??
1A-741 (triangle) A -??
1A-743(triangle) B-??
Hope this gives you what you need.
Jeff