WTB: Lasco 11 speed cassette for 10 speed wheel (or CS-HG800-11)

Looking to upgrade my mechanical group set on the bike (going shimano ultegra 11sp - but happy with 105 or anything compatible for the cassette). But that leaves me not wanting to spend more on a new wheel set at the moment. So I thought the machined 11 speed cassette would be a good option… and I’m hoping someone has one laying around collecting dust as they upgraded their wheelset (where I might find myself in a year or two). Or a used CS-HG800-11 which I understand to be compatible with the 10 speed hub.

Best,
Mark

I think I have one or two of these laying in a box somewhere. PM me and I’ll dig up what I’ve got