Thinking of making some of these up as mine works really well.
Would be adjustable for quickshift in both forward/backwards and left/right motions. Also allows for minor adjustment of linkage alignment without the need get under the car and mess around with the nut and knurled shaft.
Would use decent bronze lined rosejoints (but these could be upgraded at cost for teflon lined items, about £10 more)
Price is £50 posted and are made to order,
Would possibly be discount if you exchange your old linkage (just the pivot bit).
how much if i send you 3 old linkage pm me plz