All Brembo pistons and seals and caps are of the same construction of that era
I buy seal sets direct from Brembo parts supplier to rebuild calipers, the last axle set I bought was 8 piston seals, 8 dust seals, four bleed nipples, that came to about $130
The pistons very rarely need replacing unless they are corroded.
If you fancy stainless steel bleed nipples then you can buy the Ducati motorcycle ones
My local one here in the UK
www.modeperformance.co.uk
http://moderacewear.com/modeperformance/...2013v2.pdf
Its all by piston size so there is a pdf on this site that gives all the part numbers
Might help you find genuine Brembo spares outside of the Porsche banner for considerably less money