That looks like one of those ultra-cheapo
"$16.99 delivered" eBay ones from India like I put on my own 2005 "Military". I had to cut down the "Dist. Tube LH Black - Footrest" (Part No. 801033 [new] / 110230 [old]) about an inch to fit, and then shimmed with a few random washers. It still leans a bit more than I'd like, but hasn't dropped the bike yet. Then again, for any stop for more than a minute or three I'll hump it up on the center stand.
If you're just pulling that sidestand off anyhow, you could probably still just use that bushing and a washer or three to shim out the footpeg mount.
FYI, there IS another more rearward-mounted "military-style" sidestand
like this one that kind of looks like a machine gun tripod leg. I don't believe it's period correct for what you're going for, and most folks with them seem not to like them much, most often owing to their reportedly extreme lean angle. But I thought you should know about that option. Constantly needing to yank the beast up onto her center stand for every little stop gets old quick.