Kiddo - I could not find anybody. But I chose the option of 'wheel chair' for the travel. And he traveled through Qatar Airways. I found some companions from Kathmandu to Doha and no one from Doha to Huston.
Actually, I found that travelling through wheel chair is as good as travelling with companions and even better in some aspects because the wheel chair attendant will take care of all travel formalities and documentation for you. They received him at Kathmandu, took good care during the travel period and handed over to us. Doha airport is similar to Kathmandu airport in the sense all workers are Nepalese.
And I agree, there should be a separate section for 'travel' in Sajha so that the information could be shared and useful tips would be handy.

- Kanchho.