I’m not sure it’s worth it tbh, Ayup are great quality etc but the truth is, they’ve never been bright and the current upgrade takes them up to the level that everyone else was at in about 2010. Lumens aren’t everything but you could get a decent quality (high end magicshine, fluxient etc) and much more powerful light for about the same and keep your ayups as spares.
(I think the Ayups use a 7.4v battery so would be compatible with many brighter head units, but it’s quite likely you’d need to cut and shut the connectors which isn’t ideal.)