Here you can get 1908 edition.
https://upload.wikimedia.org/wikipedia/commons/3/3b/Allopanishad_in_Satyarth_Prakash.pdf
English Translation:
I take refuge in our Allah [La, to perish, and alla, eternal] who
protects Mitra [sun] and Varuna [the god of water]. There is but one
God [Illelle]; the king, Varuna, again takes refuge (in him).
Everything is God; sun and stars. Everything is God; Varuna, the Sun,
the illuminator. The Great Breath, the Lord, is the Sacrificer. The
Lord is the Sacrificer. Allah is the first and best, the highest;
Omnipresent; Highest of all Gods. He is only One; ever remaining. By
sacrifice is Allah to be propitiated. Allah is sun, moon and all
stars. Allah is (the God) of Rishis and all other deities, and of
Indra, the first Maya [primordial matter] and the ether. Allah is in
the earth and in heaven and in multifarious forms. Everything is
Allah. Everything is Allah and everything is He. Om is Allah.
Everything is He. By nature eternal. Atharvan [the Rishi] bows down to
such. Give us water, cattle, siddhis, and things that live in water,
and Phut [a mantra]. The Slayer of enemies. Hum, Hrim. Nothing but
Allah; nothing but Allah.