Inspirerad av @KRyan kommentar, grävde jag lite icke-mänsklig aasimar del :
Non-human aasimars have the same statistics as human aasimars with the exception of size. Thus a halfling aasimar is Small but otherwise possesses the same statistics and abilities as a human aasimar—the difference is purely cosmetic. Non-human aasimars do not possess any of the racial abilities of their base race. However, they are usually raised in the same cultural context as other members of their base race, and thus generally adopt the same fighting style as their peers, use the same types of weapons and armor, and study the same skills.
(betona min)
Det passar mycket med vad OP letar efter. Finns det ett sätt för en gnome att få tag i favoritalternativen från en aasimar istället för sig själv? Ett sätt att uppnå detta är att vara mekaniskt en aasimär och smakfullt en gnome.
I bonus borde du kunna använda, med din baslopp, den ändrade loppfunktionen:
Scion of Humanity Some aasimars’ heavenly ancestry is extremely distant. An aasimar with this racial trait counts as an outsider (native) and a humanoid (human) for any effect related to race, including feat prerequisites and spells that affect humanoids. She can pass for human without using the Disguise skill. This racial trait replaces the Celestial language and alters the native subtype.