@bazb
If I were you I would get a factory rebuild - this is the same as a new cartridge.
As far as I am aware the factory rebuild is significantly less than the full price pot a new one.
With all due respect to the rebuilders the Lyra styli are special order, and a retip cannot match the performance of a factory rebuild.
As an example JCarr has posted on this forum that the Soundsmith retip stylus are signicifantly larger than the original Lyra stylus.
Although others may say the retips sound excellent, remember they are comparing the performance to a worn out cartridge, not factory new.