Damaged Front Rim

[BFG]

Yesterday was my brother's wedding in Dullstroom so I decided to take Friday off and head out there on the back roads. About 12km out from Dullstroom I hit a rock at fairly high speed and put a big ass dent in my front wheel.
I'm not even going to bother trying to get it repaired, I think it is FUBAR and I wouldn't trust it anyway.
So my question is this, what is the best option for a new front rim and what would I look at cost wise?

 

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