@erictgrubaugh I was able to find the following from the page source, not sure if there are more:

${companyInformation.companyname}
${companyInformation.legalname}
${companyInformation.custrecordsalesforce_subsidiary}
${companyInformation.formlogo}
${companyInformation.pagelogo}
${companyInformation.displaylogointernally}
${companyInformation.url}
${companyInformation.state}
${companyInformation.dropdownstate}
${companyInformation.country}
${companyInformation.email}
${companyInformation.fax}
${companyInformation.basecurrency}
${companyInformation.employerid}
${companyInformation.taxid}
${companyInformation.state1taxnumber}
${companyInformation.fiscalmonth}
${companyInformation.timezone}
${companyInformation.companyid}
${companyInformation.mainaddress_text}
${companyInformation.mainaddress}
${companyInformation.shippingaddress}
${companyInformation.shippingaddress}
${companyInformation.returnaddress_text}
${companyInformation.returnaddress}
${companyInformation.systemnotes_SystemNote_FIELD}
${companyInformation.systemnotes_searchid}