52 replacement chainring - ultegra 5703

[ElyDave]

Anyone know if these are now pure unobtainium?  Replacing the chain ont recumbent today I noticed that the 52T ring on the 52-39-30 Ultegra (6703) was getting a bit on the worn side. 

My Google-Fu is failing to find anything available.

I have found this https://www.bike-components.de/en/Shimano/Ultegra-FC-6750-FC-6750-G-10-speed-Chainring-p31794/?o=149200259-glossy-grey-50-tooth , 5-bolt 130BCD, 10sp 50T for a 50-34.  Would this work, or chainline all wrong?

[Hot Flatus]

I would be tempted to talk to Spa and ask them if they have a TA or Stronglight ring that will fit

[ElyDave]

Its the aesthetics as well, the ultegra triple has a particular "aero" type profile, as you say, worth checking though

[andyoxon]

FC-6703G 52T-D available on Fleabay from Japan(!) £123 + free postage + ?Brexit surcharge

ETA Doesn't help but a new one sold on ebay yesterday £55, so it looks like they do come up...

[ElyDave]

I meant 6703 - I've resigned myself to possible e-bay interactions, not looking forward to it

[Adam]

Stronglight do a 130BCD 52T.  Ref. 3700223700462.

[ElyDave]

only thing is you have this profile on the ultegra, so a flat chainring will look very odd, but so be it if that's the only way.

https://www.leisurelakesbikes.com/parts/chainsets-cranks/shimano-ultegra-6703-10-speed-hollowtech-ii-triple-chainset-silver__55697

Why is it at least one bike needs something doing to it all the time.