The teenage duo are available to go straight into the squad after arriving on loan during the week.
Howieson has joined from Burnley until the end of the season, while Everton midfielder Lundstram will stay at the Keepmoat for a month.
Midfielders Paul Keegan and David Syers and striker Iain Hume are back in contention after returning to training following injury but midfielder Martin Woods is definitely out after suffering a muscle tear that will keep him out for a month.
Striker Chris Brown and defender Andy Griffin remain long-term absentees while Shelton Martis has been released by mutual consent.
Rovers have failed to win any of their last four games but are only outside the promotion places on goals scored.
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