In reply to jdh72:
Dude,
what brand of Tent? Take a walk down Tradevi Marg, there are some genuine gear shops whop may stock what you're after....
Failing that down the bottom end of Thamel, there are some shops owned by Sherpas, stocking used gear off various Expeds. They again may hold what you're after if of course the tent you have is a commonly used one...
Long shot I know....
To get them posted out, USE NO OTHER CORIER THAN DHL.... they have various agents in Thamel, google for reviews then get the folks to speed courier out to you.
I've used DHL in KTM before, as lived there for a while, and had no worries.
Good luck!