I would second Wolfin as a good supplier of hard to find fabrics, especially wide fabrics as they were originally theatrical chandlers and sell materials to make back drops and the like.  The other supplier we use for those kind of fabrics is Whaleys in Bradford.
https://www.whaleys-bradford.ltd.uk/fabrics/section-p-wool-prepared-for-dyeing-printing?p=2

best
Jo

Joanne Hackett ACR FAIC
Head of Textile and Fashion Conservation
Victoria and Albert Museum


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-----Original Message-----
From: Textile Conservators [mailto:[log in to unmask]] On Behalf Of Anne Peranteau
Sent: 02 May 2018 22:46
To: [log in to unmask]
Subject: [EXTERNAL EMAIL] Re: Bunting fabric

We have sourced wool "nun's veiling" from Wolfin Textiles in the UK, a plain weave with 18-20 threads/cm (z twist yarns), 137 cm wide, GBP 14.50/m.  Wolfin's will also send free sample swatches.
Good luck!
Anne


Anne Peranteau
Textile Conservator
Museum of New Zealand Te Papa Tongarewa
169 Tory St  Te Aro 6011 
Wellington
New Zealand
+64 04 381 7332
+64 0226113255

-----Original Message-----
From: Textile Conservators [mailto:[log in to unmask]] On Behalf Of Jeannette Huij
Sent: Wednesday, 2 May 2018 7:36 PM
To: [log in to unmask]
Subject: Bunting fabric

Good morning to you all,

At the moment our textile department is working on a number of flags consisting of wool bunting (British colours).  Does anyone know an address of a supplier where we can buy wool bunting? Preferable in Europe? I have been looking around to find a supplier but in vain.

With best regards,

Jeannette Huij
Conservator textiles and organic materials Heritage Malta