What springs for old Blue Eagle, SRT, etc shocks?

[R6cowboy]

Looking for another set of springs that will fit old Traxxas Blue Eagle or SRT shocks. The two sets of springs I currently have on my SRT and my bro's Blue Eagle have an O.D. of 16.5mm. My old AE springs are 15.5mm O.D. and new Traxxas springs (part # 2458) are 18mm O.D.
Does anyone know of available springs which have an O.D. close to 16.5mm that would work with these old TRX shocks?

[Retro rc]

I use the kyosho spring sets for the optima and ultima re re
Part numbers are
utw 008
Utw009
Otw123
Otw124
They will give you a pretty good range of rates front and rear

[juicedcoupe]

Older Losi springs, the larger size Tamiya CVA's, and maybe ECX (slightly larger than AE).

Alternatively, you could use a spring collar and different cups, allowing you to use larger springs.