For those keeping track, I'm pretty certain the specific screen-used armbands are McDavid 651/E90771.
It can be tough to lock these down with the tops and bottoms obscured. The older McDavid 651R will also look the part - I have them in hand. There's an old-style McDavid logo on an extension of elastic that would sit beneath the elbow pad. The E90771 has just the short elastic hem at the top and the updated McDavid "M-HEX" icon stamped at the wrist. That's actually a much easier location to cover (they do it with the wrist straps) and keep covered than elastic overlapping at the elbow joint. Perhaps most telling though, the E90771 is from the same product lineup/era as the 8840R shirt, 6515 elbow pads, and 513 wrist straps. The "M-HEX" logotype is the same used on the elbow inseam, and the packaging is alike for all of these products.
EDIT: Looks like the R is still associated with the 651 - it hasn't changed since the older version. E90771 is just Epic Sports' inventory number. The 651 is what you're looking for, but look for the contemporary version of it. M-hex logotype at the wrist! One way to be pretty safe if ordering online is to order directly from McDavid. You'll pay a few dollars more but know you're getting the current sleeves.