crank arm offset & where to buy?

I want to keep 175mm length, but need more offset from ~ 1" to ~ 1.75" on the left arm

I would try to rebend the arm, but it would shorten alot to gain 3/4 offset.

Why can't I find any offset measuremnt for crank arms for sale? Just lengths, but the pics show obviously there are different offsets.

Can anyone point me in the right direction here?

btw it's a square taper bb

Thanks

www.amazon.com/gp/product/B0025UINFC/ Is this what you are looking for?

I think they're for installing a bb that is intended for a wider frame?
Like installing a 80mm in a 68mm bb shell.

I'm looking for crank arms.
http://www.amazon.com/Assembly-Stroke-Bicycle-Replacement-Motorized/dp/B00KWLL8K8/ref=sr_1_5?ie=UTF8&qid=1428165412&sr=8-5&keywords=wide+crank

Here's wider ones, but how much is unspecified as well as bb type they are for.

http://www.amazon.com/SR-Suntour-Crank-175mm-Black/dp/B00B2LYM3C/ref=sr_1_2?ie=UTF8&qid=1428166545&sr=8-2&keywords=xct+crank

Here's one for my jis style bb, but the offset is unknown.

I have one of those XCT crank arms. I needed it for my fatbike when I installed a BBS mid drive. I don't remember if I measured it, but I attached a picture.

Thanks for posting. I did find your thread and saw that picture. You said something like 20mm increase with that arm, but I don't know what you started with.

Could you swing the pedal to 90deg up and measure distance to frame? That measurment minus the distance from frame to crank arm bb end is the offset. I'm looking for ~1.75" or about 43cm.

Thanks

It turns out those arms were about the same as mine already, and most mtb arms.

It turned out to be easier and cheaper to by another sealed bearing bb, and modify the length as needed. It allowed adjustment of chainring side too.
I was 'scared' because never had taken a bb apart, but it was cheaper, not too hard, and allowed for more customization than messing with crank arms.
http://custommotoredbicycles.com/wide_bicycle_pedal_crank_sets_for_clearing_4_stroke_motors68mm_bottom_bracket
About halfway down- the 6" sealed. I shortened it w/grinder as necessary. The seller was nice too.