Parachrom Blu Hairspring

[nyc10009]

I just bought an Explorer 114270 (K Ser#) & love it's simplicity & design.
Though it's in teriffic condition, neither dealer nor I know if its been serviced.
Of course, I'm going to assume it hasen't & plan to send it f/svc next few
weeks. Can I 'upgrade' to Parachrom Blu Mainspring? I plan to
replace mainspring during svc anyway. My independant says he can get
OE Rolex parts from his "sources"

Rolex is like the Masons; I'm surprised there isn't a secret handshake.

Anyway, 'seems Parachrom Blu is a worthy upgrade; if parts can be had.
Is it doable--adding a Parachrom Blu to a 3130 movement? Any Part#
info I should be aware of? Thanks!