Help sourcing magnesium anode for trim-tab

[alt]

There were 2 circular zinc anodes on my trim tabs which I need to replace with Magnesium.

The max diameter that the circular replacements can be is 72mm and has to be able to accept an M10 bolt, but I can't seem to be able to find this.

Alternatively, I could install a bar anode, like the one in the pic I took on a neighbouring boat today, but again not having any luck... maybe i'm no good at Googling.

The width from outer edge to outer edge of the bolt holes is 90mm, the holes are 10mm each so the inner to inner of the bolt holes is 70mm.

Anyone got any advise?

Holes on the trim tabs:

Anode on neighbouring boat:

 

[omega2]

www.zincsmart.com

 

[tico]

he's on holiday/stocktaking until Tuesday

 

[pondfish]

Force four got zinc and Magnisium but there are some on flee bay

 

[alt]

Got sorted with Solent Anodes guys, thanks for the help

 

[KevB]

Got sorted with Solent Anodes guys, thanks for the help

I usually use zincsmart but as said are on holiday so gave solent anodes a try. Excellent service.