Welcome.
Your going to need a swingarm, chain, and brake line to extend it.
Lsr makes then but they are about 1000$ last I checked
Asr makes some but they are about 800$
Scott Hansen (a member on here and the builder on my swing arm deadlasts swing arm) made a few for 430$ but still required a carrier and brake caliper mount.
The cheapest way to go and the way that both gen1pat and wo ya went is buy one from the swingarm shop on eBay. They go for around 200$ if I remember right. They still require paint I do believe and swing arm pivot bearings.
Really the question is is it really worth forking up a few hundred bucks or more to get one?
That's up to you. I personally love my +1 for mx and my style. It's perfect.