Does anyone have or know where I could find a copy of the meru tantra? I know nothing about this text. When was it composed? I have looked on gretil, muktabodha, archive, google,wikipedia, but no luck. 

The searchable archives on Indology came up with not much: http://list.indology.info/pipermail/indology_list.indology.info/2004-September/028666.html apart from a suggestion it was written in the 8th century.

I would like a searchable document ideally. 

An organisation I am studying at the moment keeps referring to it for the definition of a 'Hindu'. 

From their website:

The Holy text the Merutantra defines the word Hindu (हिंदु) as हीनानि गुणानि दूषयति इति हिंदु । (hinaani gunaani dushyati iti Hindu)'. ‘हीनानि गुणानि दूषयति’  means that which destroys (dushyati) the base and inferior (hin) Raja and Tama components (gun). Thus Hinduism is an attitude. It means being a seeker. If one is a seeker enriched with the Sattva component which destroys the Raja and Tama components then one is certainly a Hindu. By this definition, a seeker belonging to any religion, can be considered a Hindu. Hence the Hindu religion, in a real sense, views all religions with equality.

http://forumforhinduawakening.org/understanding/synonyms-dharma

Thanks in advance.