Does anybody know where I can buy just the handle? I would like a couple to put on a couple other reels I have (scorpion dc)

Call Shimano service in Irvine, CA.  They have them.

Will that handle fit on a scorpion dc? I think the scorpion dc is the same as the curado 70 body wise.

Most of shimano reel handle are interchangeable. Some handle you might need new nut cap. If you order from shimano, you get handle and knob. The scorpion DC is more like curado I with 84mm handle, I guess?. The K and SLX handle is 90mm.

Here order #5643 and #5641 (nut cap)

https://fishshop.shimano.com/collections/cu200k

If you want 96mm handle, get this Chronarch XG handle, might not need new nut cap.

https://tackletrap.com/index.php?main_page=product_info&cPath=898_792_795&products_id=11103