I don't know of any particular works that approach the topic from the angle that Ven Pategama Gnanarama takes. It seems to me that others here who are more well read and conscientious in studying the Pali Canon could help to clarify your question: it appears that Ven Pategama Gnanarama's argument turns on a so-called 'objective' understanding of 'dhamma' as mental objects.
In terms of Buddhist-inflected discourses on art and aesthetics, the first things that come to mind are mostly Mahayana-related works, such as D.T. Suzuki's Zen and Japanese Culture
, and also the works of Chogyam Trungpa. These would typically adopt the perspective that you mentioned: the co-dependently arisen relationship between the subject and object. Some resources are (I may be able to help you access academic journals if you can't access them; in fact, the one about bell hooks looks very interesting!):
'Buddhism and bell hooks: Liberatory Aesthetics and the Radical Subjectivity of No-Self'http://onlinelibrary.wiley.com/doi/10.1 ... x/abstract
'Aesthetics and Art in Modern Pure Land Buddhism'http://japanese-religions.jp/publicatio ... _Porcu.pdf
'The Buddhist Aesthetic nature: A challenge to rationalism and empiricism'http://ccbs.ntu.edu.tw/FULLTEXT/JR-ADM/indian.htm
This one by Padmasiri de Silva touches on the topic of aesthetics but it's main concern is with Buddhist understandings of emotions: http://www.what-buddha-said.net/library ... /wh237.pdf
So, this is really all I can suggest on the matter. I will have to leave to others who are more knowledgable about Ven Pategama Gnanarama's preferred mode of discourse to explicate his arguments.
All the best.