Hi Jezzb,
I got in contact with the manufacturer in Germany in 2013, not much use to me in Oz, but there you go. Details are
Fa. Bokondi
Anthony Boronczyk
Attenkirchener Str. 4
84072 Sillertshausen
Germany
Tel: 08752 / 810170
Fax: 08752 / 810169
At the time he quoted 240 euro (+VAT and shipping) for a replacement.
The guys at "Myyacht" in Sydney have one in stock too AU$500 follow the link
http://www.myyacht.com.au/7/on-line-store/322-Transom-RamWhy do I know this? Well about two years ago (2013) the transom would not go down. Found that one ram was jamming and over loading the other and causing the whole lot to stop. Pushed it past the sticky bit and sprayed some WD40 into it. The full tool kit if it moves and shouldn't use gaffer tape, if it doesn't move and it should use the WD40! Fast forward to 2015 and it stopped again, this time with a funny smell. Not going to recover that one with WD40. The smoke that makes electrical things work had escaped!
With a small budget for repairs, and a natural bias against mixing electrical equipment and salt water decided to buy a handful of pulleys and some spectra. for about AU$300 replaced the rams with a 7:1 pulley system that will last for ever.
As a consequence of all that just realised that I have a used spare ram too! If you are interested
Cheers
Mark