Rothco Alice Pack Frame with Attachments – Includes Padded Shoulder Straps and Kidney Pad Waistbelt – Lightweight Aluminum Construction

I'm all the way on the west coast of the US so, don't know about delivery there, but I've used a couple frames in the past, one for a customized spirit pack and most recently for the 84 pack. https://a.co/d/08WTTJx5 https://a.co/d/0dlAm3MI Both of these ones are good and will work with a pack. The MT frame has more modernized straps so they're not film accurate but it's a very nice fit. If you can get either of those, the MT or Rothco they'll both work well as pack mounts.

It definitely looks like they sent you a different model or variation of LC1. I am now noticing that the number of rivets connecting the frame together is different throughout your design, too. You should ask for a refund and source it elsewhere for your pack. This is the exact Rothco Amazon listing I’ve ordered in the past.