Well, there are thousands of companies around dealing in printing stuff. It will be great for you to find a local company. Because it will reduce you budget as compared to some of the outstation companies. They will charge you higher in addition to the original costs (will include shipment charges and other duties). But, PrintingBlue.co.uk is one of the best printing companies online. They facilitate you will free shipment, free design and free proof reading etc. You can get your customized helmet stickers for batting with discounted rates.
PVC stickers and bumper stickers are the perfect fit for putting stickers in your helmet. I recommend SingaPrinting - http://goo.gl/9R7LLH. They do custom artwork, size and shape at an affordable price.
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