After reading this thread and being interested because I have always found the 800's grips too small I happened to be waiting to be served at a local business and they had a promotional cricket bat grip on the counter. as below;
This is to support the Mcgrath Foundation which was started by a very famous Australian ex test cricket player after his wife died of Breast Cancer, and usually involves the colour pink.
It occurred to me that if I got a similar grip in a more manly colour like ... black (although I did consider yellow to match my bumble bee) and cut it down it just might work. Much to my surprise I cut two sections 10cm long, heated them in hot water, sprayed a little windex on the standard grips and in almost no time I had the following results;
Have only ridden about 70Km but am impressed. Grips are more comfortable, the heated grips still work, as a bonus the vibration through the handlebars is reduced to almost nothing and low speed throttle control is vastly better.
This tip might be a bit difficult in those unenlightened countries where Cricket isn't played ( A couple of minor nations in North America come to mind
), but it should work for the rest of us. I suspect there must be somewhere in New England or Canada where you can get cricket gear, but there is always mail order.