Replacement forks for a 2015 EC300 - need some advice

[BillH]

So I have an ec300 with damaged forks. As they are Marzocchi I cant get spares. I've taken the forks to K Tech a suspension specialist in the UK and they cant even separate the forks. Basically the cartridge adjuster thread is damaged to the extent is wont screw into the top of the forks. Dont know how this happened but just noticed it before taking it for a test ride, may have sheared when my son was out on it last time and he didnt notice.
Anyway, unless I can find a 2nd hand set (and I've been looking for a while), I will need to replace them.
Q1 - does anyone know of a set for sale
Q2 - does anyone know if they were used on another bike could I convert a set from something else (I heard somewhere Beta bought some Marzocchi stock).
Picture of the damaged forks attached.IMAG0435[1].jpg