Blind stitch foot for bernette bernina funlock 004 where can i buy from .

Added:
For the United Kingdom, you may find the right sewing machine foot here:
http://www.berninasewingshop.com/
(Copy and paste the web address into your browser address box.)
I was not able to find the blind stitch foot on that website. However their telephone number is given near the upper right corner of the page. I recommend calling them and asking if they have the part.

Hello, Evelyn -

If you reside in the USA, you can find one to purchase online here:
https://www.sewingpartsonline.com/bernette-004-serger-machine-parts.aspx#filter:ptype_gmcfeed_1:$2520Presser$2520Feet

If you reside outside of the USA, if you add your location to the Comment box, I will try to find a source for a blind stitch foot for your machine in the country where you reside.

Best wishes.