When asking for help ALWAYS state your model in your signature area ie engine cc/type/model year/manual or auto etc.

Try some online scrappers for the part.

Always make sure front sensors are CLEAN

Using the gunk normally means punctures can't be repaired successfully; so don't worry about it

If you're desperate for kit, ALDI/Lidl sell them periodically, and tyre pumps.

Other makes are available, but Nissan's are competitively priced, and why the QQ is a top
seller in UK.
Perhaps you need to consider less known brands such as Dacia made in Romania for your budget.

RAC don't do repairs; they point you to one of their preferred garages. I've used RAC Extended Warranty recently for a repair but insisted they use local franchised dealer.
Look on YOUTUBE for videos on this problem.

In US I wager 98% will be auto boxes, not manuals.

This may help but is for earlier iteration with ROUND front fogs

Study your manual harder!

This extract from an earlier QQ Model;

Or you could consider a SMART REPAIR.
eg
https://tdlrepair.co.uk/