Crankset help

[Shut Up Legs]

I bought a Shimano Tiagra FC-4603 crankset last year, and have had it on my tourer/commuter for some months now. I was planning to replace the large and middle chainrings today, but then realised that the crankset only has bolt holes for 130mm bcd chainrings, not the 74mm bcd bolt holes also, as my previous crankset (a Tiagra FC-4503) had. Because the new middle chainring I'd bought some time last year (or perhaps even the previous year?) only has the 130mm bcd bolt holes, I can't reattach the small chainring, because there's nothing to which to attach it!

The existing middle chainring has 130mm bcd and 74mm bcd bolt holes, in other words the small chainring bolted onto the middle chainring.

So my question is: where can I find a 39T triple chainring with both 130 and 65bcd bolt holes? I've looked on CRC, but haven't found anything yet (and I'm getting pretty fed up with how slow the new "revamped" site is, too). Alternatively, perhaps I need to find an FC-4503 crankset, if they're still available.

 

[Shut Up Legs]

This is what I need, well either this or another FC-4503 crankset:
http://www.sjscycles.co.uk/shimano-...middle-chainring-d-type-silver-39t-prod27799/

 

[Nigelnaturist]

130mm BCD is common for the middle and out chain rings on a triple, the 74mm BCD will be for the inner, Doubles also commonly have 130mm BCD, compact doubles are usually 110mm BCD as you cant fit a chainring with less than 38th to 130mm BCD ( hence the term Compact), usually the 74mm bcd inner ring have separate bolt holes in the spider not usually on the middle ring itself (though adaptor middle rings are available), so is that what your saying the outer are 130mm with the middle having additional 74mm bcd holes.
If so check this out
STRONGLIGHT 130/74 BCD Adaptor ring

Spa Cycles in Harrogate. Options from 38 to 46th

 

[Shut Up Legs]

130mm BCD is common for the middle and out chain rings on a triple, the 74mm BCD will be for the inner, Doubles also commonly have 130mm BCD, compact doubles are usually 110mm BCD as you cant fit a chainring with less than 38th to 130mm BCD ( hence the term Compact), usually the 74mm bcd inner ring have separate bolt holes in the spider not usually on the middle ring itself (though adaptor middle rings are available), so is that what your saying the outer are 130mm with the middle having additional 74mm bcd holes.
If so check this out
STRONGLIGHT 130/74 BCD Adaptor ring

Spa Cycles in Harrogate. Options from 38 to 46th

Thanks, mate, much appreciated . Since SJS would only let me order 1 chainring (I guess they had limited stock?), I'll probably order another using the link you provided after I receive the SJS one.