Do you know of any way these 45 mm blades can be sharpened? Do you know of any site where they can be purchased for a reasonable price? They get dull rather quickly (even the titanium ones) and they are pricey (at J,A.'s they're 16.99 a piece.).

Alot of us buy our blades from Harbor Freight. For a package of 2 the cost is Between $1.49 and $1.99 and they are called Carpet Replacement Blades item # 97642 They're website is www.HarborFreight.com just in case you don't have a harbor freight near you.
They fit 45 mm rotary cutters. And they are very sharp. :)

Harbor Freight do not have the pinking blades. All I have found are the pricy ones. I'm no help in sharpening them either.:(

i bought mine on ebay for a reasonable price. i bought several because i havent found a way to sharpen them yet either.

there are some good prices on ebay for rotary blades. here are some for pinking:
http://www.ebay.com/itm/OLFA-45mm-RO...item35b5924e56

http://www.ebay.com/itm/OLFA-45mm-PI...item519b0750f6

I saw them at Walmart for $11.

the pinking blades are not (sharpen-able) what are you using yours for to dull it so quickly? i've had the same blade in one of my cutters for about 4 years- it's still pretty sharp.
prehaps you should invest in a good pair of pinking shears---they can be sharpened and will last for many many years- i own my great grandmother's-and she passed away over 50 years ago. they are great shears!

Do the Harbor Freight ones fit any rotary cutter? I have a Fiskars and an Olfa. That is a really good price if they do.

Thanks for the references!

I've been cutting out 10" by 10's" (layer cakes).