Somewhere...give me a few minutes to find it...
Unfortunately, can't find the original paperwork and I don't remember where I got mine, but it was $20 for 2 and $15 shipping back in Jan. 2017. So I paid $17 each after shipping. I still have the spare but it's getting difficult to find the 12 VDC version of the Rexroth coil so I think I'll hang onto it.
Here's the specs off of the coil: Rexroth 100% ED 12 VDC 2.7 W; W5199 stamped on the metal coil cap.
Meanwhile, here's a link to a Grainger page where they carry it, but it's $41 just for one coil:
Rexroth 12 VDC Coil
I did find one on eBay but the problem is that it's called a 12 VDC coil in the header, but the picture shows a 24 VDC. That one was $15 + shipping. I lost it though in the blizzard of offers by eBay (those idiots have the search set up to confuse) so no link.