Simplex rear derailleur replacement

[Nick1956]

Hi
I am in the process of "restoring" a Bianchi (mid 80's sprint I believe) and wish to source a replacement rear derailleur - the current one has plastic (delrin) jockey wheel cages and one is fractured. I've already sourced a front one after the collar snapped.
Searches have failed to locate the original (I've been through all of those on velobase) or what will be a suitable replacement.
Can anybody help suggesting a replacement, either new or used?
The bike is ten speed (cassette = 5 speed).
I am not looking to spend a fortune!!!
It is direct mounted to the frame. See pictures linked below.
My apologies if I have used the incorrect terms in this post. Any help would be much appreciated.
Nick

https://www.dropbox.com/s/riwlss5i8wfk7 ... .45.38.jpg
https://www.dropbox.com/s/nt4hahaf3r5nc ... .51.38.jpg
https://www.dropbox.com/s/lo4h5kpe1yk5c ... .51.45.jpg

 

[Ian Raleigh]

I'd get a better Simplex mech' and forget about trying to find one of those shitty plastic things.

Plenty about.

 

[Midlife]

http://www.ebay.co.uk/itm/Simplex-Prest ... _248wt_959

Simplex prestige mechs are usually as cheap as chips if you want to go simplex and can put up with the red badging........otherwise plenty of cheap used rear mechs about.

Shaun

 

[Nick1956]

Thanks guys.
Not sure the ebay one will work though as it is not direct mount - i.e. has a hanger attached.
Nick

 

[Ian Raleigh]

You normally can take off the hanger.

 

[predki]

Re:

The dropout seems to be Campagnolo type rather than Simplex.