WTB (PC)[PC][WTB] Semi-specific Fragor Riven (elemental fixing)

[Kthal]

Needing it for elemental fixing - Needs to have Cold and Heat, must be able to form Viral+Heat with only one other elemental mod.
I'd also accept +8 seconds or higher combo duration in place of one of the elements.

Other stats aren't too important, but no faction damage. I'd prefer no downside, but anything not too horrific would be acceptable. (-status duration or channelling damage would be least detrimental)

Offering 150-300pl depending on other stats and how well they fit my end goal.