clarion rcb 138 converter

Hello,

I've got an old Clarion CD-Changer (CDC 634) and it uses Clarions old C-BUS interface.  All of Clarions modern head-units use ceNet instead of C-BUS. I was wondering if anyone knew how to convert between the two standards without having to try and find converter RCB-138.  The problem is that the converter was discontinued a couple of years ago so is now impossible to get hold of.... I want to upgrade my headunit and retain the old CD-Changer.  Of course it would be easier to just forget about the CD Changer but that's not fun.

https://www.crutchfield.com/S-ZAOlQaeCwHV/App/Product/Item/Main.aspx?i=020RCB138 

it show they are in stock, but almost as much as a ne c-net changer

https://www.crutchfield.com/App/Product/Group/ProductMenu.aspx?g=65500&tp=132&nvpair=FFBrand%7cClarion#

OOopps I see you are in the UK may be ebay