http://www.futurlec.com/index.shtml

http://unicornelectronics.com/ (parts are available at any electronic part supplier.  This is not intended to be an endorsement of any but are just examples)

http://www.jameco.com 

http://www.bgmicro.com

http://www.midwestsurplus.net/en-us/front.html

(this is a small electronics surplus store near where I live.  If you'd like to support a small business with your purchase, here it is.  I have purchased most of my parts from here.) 

The i8272 FDC is commonly also known as NEC765A which are fairly common.  A quick check at JDR.com, UnicornElectronics.com, and BGMicro.com

http://www.jdr.com/interact/item.asp?itemno=gr-z80

http://unicornelectronics.com/IC/CRT.html

http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=9010

The FDC9229BT data separator is a lot more complex and a bit hard to find. It will be difficult to obtain which is why I did some research on it previously.  You can substitute the FDC9239BT too I believe

http://www.chinaicmart.com/company/stock/?keyword=FDC9229&userid=788

http://store.americanmicrosemiconductor.com/fdc9229.html

http://store.americanmicrosemiconductor.com/fdc92c39bt.html

http://www.acpsurplus.com/servlet/Detail?no=2775

You can also find other sources at

http://www.area51esg.com/search-semiconductorss-capacitors-resistors.htm?part=FDC9229BT