http://www.sigmaaldrich.com/catalog/product/sigma/42597?lang=en®ion=US

http://www.biocompare.com/Molecular-Biology/11600-ddTTP/

http://www.simzymes.com/index.php?main_page=product_info&products_id=18

http://www.bioron.net/en/products/nucleotides/chain-terminators/single-ddntp/ddttp/

http://www.thermoscientific.com/ecomm/servlet/productsdetail?productId=11961648&groupType=PRODUCT&searchType=0&storeId=11152&from=search

http://www.axxora.com/JBS-NU-1018S/ddttp-s-pack/

http://www.sigmaaldrich.com/catalog/product/sigma/42597?lang=en®ion=US

http://www.biocompare.com/Molecular-Biology/11600-ddTTP/

http://www.simzymes.com/index.php?main_page=product_info&products_id=18

http://www.bioron.net/en/products/nucleotides/chain-terminators/single-ddntp/ddttp/

http://www.thermoscientific.com/ecomm/servlet/productsdetail?productId=11961648&groupType=PRODUCT&searchType=0&storeId=11152&from=search

http://www.axxora.com/JBS-NU-1018S/ddttp-s-pack/

Thank you!

Sigma and Thermoe Scientific should still have them, probably also Amersham (although I lost the overview to which company they belong today).

Http://www.roche-applied-science.com/proddata/gpip/3_6_5_2_6_3.html

http://www.perkinelmer.com/sg/Catalog/Category/ID/Dideoxynucleotides

Trilink Biotechchnolgy has them.

http://www.trilinkbiotech.com/cart/Scripts/prodList.asp?idCategory=86