DTRPG has Cepheus Engine on the Deal of the Day,
$3.50 for the pdf or $13.50 for a print copy.
It is the Moon Toad version, Which is basically a copy of the SRD.
It has some layout issues, but it is still fairly serviceable.
Facsimile is the version I supplement with my house rules, and then print up on my own for my table: it's a very solid foundation for LBB1-3 CT (despite some of the quibbles about the errata being grafted on in some cases, rather than integrated).