Fuse holders for W203 dash-end fuse box?

[MBNuB]

Any ideas where I could source additional fuse holders for the end-of-dash fuse box on my W203?
Spoke to my local dealer and [despite giving them the part number - A 203 545 02 00 for the fuse box itself] they couldn't find a fuse holder part number, without which they can't supply them.
I'm trying to provide power to my Road Angel from its own fused supply.
http://forums.mercedesclub.org.uk/showthread.php?p=188787#post188787

 

[hmang]

give WURTH a try

 

[television]

I have searched and nothing listed, I often use an inline fuse holder and splice into the ign switch (always) live or if you do not mind key 1 or 2 the cigar lighter feed