Alibris is one of my MAIN sources for books now and I frequent the site a lot. I just added a bunch of books and videos that I want for my birthday this year. I have an ongoing wish list at Amazon and also forwarded my private list of WWII books and videos to my hubby and step-daughter etc. Hint, hint to the family! 
Now how many women do you know that want WWII videos for their birthdays? 
Right now I'm going after videos on the engineering units of VI Corps and also the units that the 540th were attached to or in direct support of, such as the 82nd Airborne, the 34th Inf Div, etc. I have a great list and most of the videos can be found for around $19.95.
I had found a video regarding the 540th in Italy and damned if I can't find it again. I don't know why I didn't bookmark the thing. 
I'll find it again. Me, I don't give up! 
Thanks for your thoughts and suggestions as always.
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"