need a rudder pushrod!

so I'm thinking of converting over to a dual rudder setup on my Fastech and I'm sort of stuck. I have everything I need except I can't find the original pushrod because it's been discontinued. since my local shop doesn't stock any parts for boats :doh: I'm thinking I can easily modify some other models pushrod to fit my needs. only difficulty seems to be proboat doesn't list lengths of any of their replacement pushrods so I'm not sure which one to order. just worried I'll order one that's either too short or just close enough to the original to be too difficult to reshape. anybody got any suggestions? Thanks for any help