Lacis Museum of Lace and Textiles

In the USA, in California, is Lacis Museum of Lace and Textiles.

I have not been there, but I have contacted them for information and they have been very helpful. They offer courses too.

They also have a shop called Lacis.
Their shop has unique supplies for less well known styles of embroidery, they have lace making and weaving supplies, and have a large selection of books and pamphlets (many out of print) for sale on a myriad of types of embroidery.

I was able to get booklets on Lagartera embroidery (a Spanish type of embroidery) which are impossible to find from them.
They’re extremely knowledgeable and helpful.