If you could send the tube to Denver, Zach Baird that frequents this site would be a good choice, not sure who to reccomend in Oregon...
How bad is the leak? If it is small, you might be able to get by with aqua seal, there is also a product from Inland Marine that you ad to the inside of tubes for pin hole leaks.
If that is indeed a Maxxon tube, then it should be PVC, and you can order appropriate glue from North West River Supply's, the cleaning agent for PVC is MEK.
Hope that helps You out some.
"Everything is written in the book of nature. This book is always open."