Jay,
I'm guessing at $4.96 per foot you may be thinking twice.
Not trying to pitch my own stuff here but I'd recommend finding something else.
There's a reason you can't easily find this rope. PBO is an exotic fiber which should be reserved for grand prix sailboats and replaced often.
Some of the skiff guys use it but it's uses are mostly being replaced by technora.
PBO is used because it's the strongest and most reliable fiber if you plan to replace it often.
It is the worst fiber for environments with a lot of UV. I have a customer in San Diego that replaces his running backstay with PBO cover every year.
Vectran, while better in UV is not much better. Some of the grand prix boats use it in cover as well but for it's great abrasion properties.
Both are very strong while they are new but when they go they go with no notice, they are disposable for as soon as they start to look suspect they have to go.
What boat are you using it on? Should be no reason standard polyester shouldn't do the job. If you want something more abrasion resistant then step it up to something with Technora. If you're looking for something pretty, polyester can be made to look even cooler than flavored ice, any high end rigger will have more modern looking ropes.
-Todd