You can order a reed from a shop (so you can buy minimun one reed) or you can buy a reed ordering to a reed maker (you will need to buy minimun 5 reeds = 50 euros). It´s possible to find the reeds of the reed maker you are looking for in a shop, so you can buy only one reed if you need it.
Only be sure to order the correct reed: male reed for male chanters and female reed for female chanters. You can play all reeds in all chanters, but you know, it´s better if you do the things in the correct way.
I think we haven´t differences in the playability. All galician bagpipes are, usually, playable with the same pressure and the same type of reeds, so the difficult is stantard.
I haven´t any care with my reeds, just play very much and get fun. Actually, I play with a 4 years reed and I´m happy with this. I only don´t lick the reeds with my mouth.
The main difference with scottish reeds (not with uilleann reeds) is the metal bridle that can control the opening of the reed. You will need to push in the front of the briddle with pincers for close the reed, or push in the sides of the briddle for open the reed.
Some Galician Reed Makers (I put in black the makers that I usually buy reeds):
Antonio Gonzalez (Rubén)
Carrero Blanco, 95, 5ºA
Telefone: 982 24 43 27
Aurelio Fernández - "Lelo"
Telefone: 679 88 05 40 - 986 29 62 80Brea
Telefone: 981 92 40 52
Telefone: 667 792 799
Fco. Javier Pena Louzao (Bossa)
Urb. Riocobo (Via Láctea), Bl. 3 2º C
San Cibrao - Cervo, 27888
Telefone: 685121828José Luis Carballo Enríquez
Batalla del Salado, 1, 1ºE
PONFERRADA (León), 24400
Telefone: 987 41 90 73Liñares
Praza Fonte dos Ranchos, 29, 2º
Manuel Cima Martínez
Xinzo - Ponteareas (Pontevedra), 36891
Telefone: 986 66 01 41
Marcelino Vázquez Fernández
Barcelona, 67, 4º Es.
A Coruña, 15010
Telefone: 646 853 626 / 981 262 878
Marcos e Anxo
R./ Blanco Amor, 17 - 2º A
Santiago de Compostela (Coruña),
Telefone: 981 56 22 51Muíño
Telefone: 94 462 25 09 e 981 50 76 57
VICENTE DIAZ FUENTES
Rua Monte Faro , 41, 3º G
Telefone: 982 216 281
Some Online Shops where you can buy reeds of these makers:http://www.arcoirismusic.com/http://www.tununtunumba.com/