There are couple of MILF paysites that have updated their photo galleries in 2014, such as:
Payton Leigh contains HD in following niches:
Straight: Blonde, Boobs, Hardcore, MILF, Zodiacs
Ethnics: American
Program:
TWM Cash (31 sites, NATS). Revenue: 50%
Pay method: wire, wire US
Promo:
Photo FHG (1), Tube clips (3)
My Wife's First Monster Cock in following niches:
Straight: Big & Monster Cock, Hardcore, MILF
Ethnics: Interracial
Program:
Hush Money (14 sites, NATS, in-house script). Revenue: 50%, $35 PPS
Pay method: check, Paxum
Promo:
Photo FHG (73), Video FHG (6)
My Mom's Fucking Blackzilla in following niches:
Straight: Big & Monster Cock, Hardcore, MILF
Ethnics: Interracial
Program:
Hush Money (14 sites, NATS, in-house script). Revenue: 50%, $35 PPS
Pay method: check, Paxum
Promo:
Photo FHG (70), Video FHG (15)
Karen Fisher in following niches:
Straight: Big Tits, Blonde, Hardcore, MILF, Personal sites, Zodiacs
Ethnics: American
Program:
Solo Slut Cash (21 sites, NATS). Revenue: 25%, $30 PPS
Pay method: check
Promo:
Photo FHG (50), Video FHG (89)
Most of those sites have morphing RSS feeds, if that's something that could be of any help.
You can check out other MILF affiliate programs here:
Milf Sponsors @ SignBucks.com