Farming the secrest boss(The Thingy)

Borderlands: The Handsome Collection [XBOX ONE] BHC Multiplayer/CO-OP and Trading Post
#1

Can someone help me farm the secret boss, or just give me a Thingy lvl.50?
I will give you a Marketer lvl 50 shotgun for a Thingy rocket launcher lvl 50.
My gamertag is CCAMJ357