I already ordered the item so I can get him indoor and control the tempFrom what I have seen, your tortoise is going to continue to suffer and probably die if you do not follow the advice that has been given. He is much too DRY. The bumpy shell (this is called "Pyramiding" in tortoises), tells the story of his being kept too dry for too long. Your tortoise must be given a long warmish soak twice per day for at least half an hour each time. His enclosure MUST be covered, if only by a shower curtain liner with holes cut out for the lights to shine down through it from above, if you cannot afford the portable greenhouse. He must have a proper diet - lettuce is no good nutrition wise and only provides water. He must have space to walk within his enclosure and hide out of the heat, which along with the dryness, will kill him quickly.
I am sorry that your other tortoise died, but please, believe now that you have done something very good by coming here and trying to follow the best advice you will find. Don't despair and leave. We all have had some bad experiences including me and many others here, we all have suffered when our animals have died and it's because we did not know the right things! Stay with us and try to save your tortoise. Thank you! We welcome you and wish you all that's good!