I am selling a repair clip/guide for any electric window regulator/mech fitted to the MK1/MK2/MK2.5 MX5 EUNOS 1989 - 2005. It is the part shown in the first photo next to the mechanism. As you can see a similar repair part has already been fitted to the mech. 
The original white guide gets brittle and regularly breaks when in use.
I have developed a repair part that is easy to fit and has been modified in key areas to avoid failure in the future. 
The part is easy to fit, requiring minimal DIY skills. Please see photo sequence for guidance - took me less than 10 minutes including taking all photos.  Easy to follow instructions will be supplied.

Any questions, please contact me through ebay. 

  

I enjoy dealing with people abroad but ebay stipulate that delivery outside of the UK goes through the Global Shipping Program. The Global Shipping Program have recently lost the plot and are seriously restricting countries they will deliver my MX5/Eunos Car parts to. Quite a few parts can only be supplied to the UK as GSP opting out! If you are in a country outside of the UK and there appears to be a block on delivery to you, please get in touch and I will do my utmost to offer a solution; the cost may well be less than the GSP service anyway.