12 Cup HB Brew Station-2006 Problem with coffee leakage

This pot served me well. i probably paid just under $50 for it. However the past few months, I notice that it leaks coffee all over the coutnertop if I do not remove all of the coffee after we pour a few cups. I noticed that there is a small tent shaped screened fileter taht is now missing. I guess it got tossed with the excess coffee or grounds. i would imagine this is some type of water filter. I can not find the replacement part anywhere. i have seen the exact filter in demo pots on store shelves. Does anyone know where I may purchase one. I am wondering if this is the reason my pot leaks coffee once it is perked. I read other peoples' comments reA: leakage..cracked screws, etc. I'd like to get a replacement screen filter and see if this makes a difference. Dismayed..but other than this it is a good pot and makes tasty, hot coffee.