Hi,
Thanks for specifying the requirements clearly. I have been in Ext JS ans Sencha Touch based developments for last 4 years and have developed a number of applications in sencha Ext JS and touch technology.
I have developed a number of custom components in Ext JS and sencha like waterwheel, vertical slider, flipper, tiles carousel etc and used these components successfully in multiple cases.
From your description I understand that you need a tree component with multiple node select option.
I can develop this . Please let me know if you want me to do this work.
Thanks,
Ayan Dasgupta.