Have you tried contacting Esoteric?
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You might try http://www.servicemanuals.net. The Esoteric UX-1 manual isn't listed on their site. However, the site says:
"If there is a manual you require that is not listed on our web site, first make sure you searched correctly and then click the CONTACT US link at the right of the page. We will then attempt to locate the manual for you and in most cases get back to you within 24 hours."