check engine light on due to an EVAP problem

If you own a 1996 model and the check engine light is on due to an EVAP problem (code P0441/0446) and the solution to the problem is to replace the charcoal canister then you are flat-out-of-luck because Toyota, in their great wisdom,no longer makes the charcoal canister for this year of truck. Toyota knew of this problem because they issued an TSB on April 3, 1998 telling repair shops how to fix this problem. I have over 186000 miles on the truck and except of the above problem, which just occurred about four months ago, the truck runs like a champ.

 

so what is the issue? does it affect how it runs, or is it just having the CEL on all the time