I need a replacement part for a bathroom light fixture packaged as Portfolio Model 37244 purchased in November 2010. I called the 800 number and was instructed to call the manufacturer Kichler. I did call their 800 number and was informed that the model was discontinued and the part I needed which was one of the "globes" Part #43288 was not available. What do I do now?

If both the home center and manufacturer told you this? As far as I know, nothing. Other than buy a new fixture.

Did you do a web search for the part number? Maybe someone has some old stock.

I believe this was a Lowe's item. Better to consider a new light.

I'd settle for a similar globe, most box stores have a big selection