I have some in my 1984 JCM 800 cab but not for sale at moment.
FYI, the 8 ohm ones are easiest to find on cabs for the Canadian market because those metal toggle Canadian Marshall amps didn’t have 16 ohm taps, only 4 and 8. So all the cabs from that era are 8 ohm.
I’ve been thinking about swapping two of them out for 8 ohm Mesa V30s as I’m considering doing the x-pattern but I think I want to keep it original.
Good luck, check out Reverb listings in Canada for a better shot at the 8 ohm version of these.