Need for ASP.NET multicolumn combobox

Hello Friends,

I have urgent requirement to develop ASP.NET multicolumn Combobox with using Combo/Textbox + Repeater/ liststview.

& on each page I will require atleast 7-8 Custom combo in Application.
So don't want bato buy 3rd Party control which have developed on Datagrid.
& don't want to buy Telerik control only for only 1 requirement. bcoz can not spend lots of amount.

Can anyone help or can anyone have developed this type of code which will have fulfillment of all basic required facility in multicolumn combo like searching , dynamic no. of column ,handling with key events etc.

Thanks in advance for help.

Regards,
Developer