[c-nsp] Bulk SNMP scan for an IP range tool?

[P C]

I am looking for a tool/script which will scan some specific arbitrary OIDs
within an IP range or provided IP list and dump the data to a file suitable
for import into Excel.  Device count is in the thousands; so being
multithreaded is a big bonus.

Before I try to write something in bash .. does anyone have any ideas or
something perhaps a bit more efficient?

Free is preferred, but I'll look at low-cost commercial options.  Windows or
Linux

Thanks!