Hello Emmy, I am Gary. Jess is from Maasin but moved away when she was 5. I wish you well in Glasgow. Do you like watching Billly Connolly? I am sure you know all about him.
The food stores you refer to are listed in threads under Asian/Filipino Food Supplies. The owner of the site wanted us to place them all in one place for reference.
On that board, only one was listed for Glasgow:
Lims Chinese Supermarket
Cambridge St
Also in Glasgow there was an event by a Scottish Philippine Charity which you may wish to be involved in.
http://www.scottishfilipinocharity.org/