Hi Tony57, I have a small qty of Electrotren catenary which I purchased in the 1980s. I, too, have searched for availability of additional parts, to no avail. You were lucky to get some ‘wires’ on eBay ! I wonder if you check out Marklin 1980s catenary on the used market as I think these pressed metal ‘wires’ are very similar to the Electrotren products ( I think Electrotren ‘knocked off’ the Marklin product to offer an ‘economy’ option ) .I would suggest just purchasing a couple of items if you can find a supply and checking the compatibility. It looks amazingly similar in the old catalogues. I would think you might find Marklin on European eBay, particularly the German eBay. Just had a look, type in 325353979513 on the eBay.de site.