In my earlier post, I wasn't talking about the Wings kits. Just some E-bay seller who I occasionally see who wheels and deals in old suspension forks and parts.
Considering what Svr said about MCU springs getting flattened over time, it doesn't really make sense to just get new elastomers. Those Wings kits look like the best way to fix your fork for the long haul. Weight-wise I'm sure it's a little heavier because of the metal springs. Big deal. The seller also says that suspension travel increases to 80mm. Anyway, good luck.