Sorry I did not find any thing new on Hellam Furniture Co. My cousin said his father bought from them for a long time, however in later years the quality of furniture went down hill.
He does not remember the address, however he said they were in business atleast 30 years ending in the mid 80's.
I also have a book made in York County and could not find any thing on them. This book only covers bigger companies, this may have been a small business. You might try and see if Hellam has a better business bu. or chamber of commerce and write to them.
Sorry this is all I have, Good Luck