i use corduroy - http://corduroysite.com http://corduroysite.com - but i'm a bit biased since i wrote it. it doesn't do purchase orders because i've never had

i use corduroy - http://corduroysite.com http://corduroysite.com - but i'm a bit biased since i wrote it. it doesn't do purchase orders because i've never had to use them, but i may be able to integrate what you need if it's not too complex.