I don't even follow what's going on. Are you saying you want to convert to a 10 speed cassette? Is there anything wrong with those Shimano bar end shifters?

As a passing thought, I found some 9 speed
http://www.aebike.com/MicroShift-Bar...s_p_64462.html
and 10 speed Microshift bar-end shifters
http://www.aebike.com/MicroShift-Dou...s_p_64455.html