Few years ago on one of my bikes I tried to change to LED indicators, avoiding to spend money on expensive ones that, just like Suzuki, original manufacturer was selling. Ended up buying 5 different sets and relays and either they were so weak (I'm freak about safety issues) or I couldn't make them blink in right sequence no metter what relay I used. After spending almost as much as the price of the OEM ones was, I ended up putting back original old ones and not having LED indicators in the end.
Lesson learned.
The Suzuki OEM kit comes with all you need, wiring, relay and guide.
I placed the order at my local dealer, negotiated with him after showing him few eBay prices and we agreed at €200 (£159). It will take 2 weeks for them to arrive.