Many of my urtext editions are created consulting manuscripts available at the IMSLP (Petrucci Music Library) site:

http://imslp.org/wiki/

Several others use facsimile editions from

Clifford Bartlett at

The Early Music Company:

https://sites.google.com/site/earlymusicco/home

I thoroughly recommend the following people:

Padraig Ó Dubhlaoidh - violin maker and restorer - always gives expert advice and high quality workmanship at:

http://handmade-violins.co.uk/index.php/padraig-o-dubhlaoidh

Liz and David Good publish an ever-expanding list of interesting music at:

http://www.goodmusicpublishing.co.uk

Reuben Katz is a fine piano tuner and restorer

http://www.rkpianos.co.uk

Other useful sites for the fiddle and folk tradition:

http://www.petecooper.com

http://www.izaak.unh.edu/nhltmd/indexes/dancingmaster

http://www.village-music-project.org.uk

http://www.hedinghamfair.co.uk/about_us.htm

Other arrangements by Tony Urbainczyk of music by

Bach (Air and Dances from Suite No.3)

Handel (Water Music and Fireworks Music)

and

Mendelssohn (Four Songs without Words)

for junior string orchestra and for violin and piano are published by Musicland and are now available from:

http://www.musiclandpublications.com