Rangers are awaiting visas for their three latest signings ahead of Sunday's game at Fir Park as boss Ally McCoist continues his search for a striker.
"We will continue to look as long as the window is open," said McCoist.
Matt McKay has now received a work permit for his switch from Brisbane Roar but will not feature on Sunday as he needs to gain his visa in Australia.
Carlos Bocanegra is in France and Alejandro Bedoya in Sweden sorting out their permission to play in the UK.
The addition of midfielders McKay and Bedoya along with defender Bocanegra means that a forward is McCoist's priority.
And the manager confirmed that he has dropped his interest in Spartak Moscow's Czech Republic central defender, Marek Suchy, after the arrival of Bocanegra from St Etienne and Kyle Bartley on loan from Arsenal.
"There's nothing concrete or immediate," said the Rangers manager about the possibility of more signings.
"But we would not be averse to bringing one or two in."
McCoist is conscious that some big-name players will miss out on the 25-man squads required to be named by Barclays Premier League clubs.
"You look at the riches some of the clubs have in England and they have to name their 25 players," he said.
"That opens up possibilities, but they don't have to name their 25 until right at the end of the window again.
"So, if anything was to happen there, it would be last-minute."
Despite Rangers' 2-1 defeat by Maribor in Thursday's first leg of their Europa League qualifier, McCoist was happy at the quality of his summer acquisitions.
Full-back Lee Wallace, who arrived from Hearts, Dorin Goian, the former Palermo central defender, and Bocanegra all played in Slovenia and the manager thought they were his side's best players on the night.
United States international Bocanegra was able to partner Goian in defence because he did not require a visa to play in Maribor but must sort out paperwork to feature in Rangers' team to face Motherwell.
International colleague Bedoya needs to overcome a similar hurdle as he completes his switch from Orebro.
Meanwhile, McKay was the latest to gain his work permit from the UK Border Agency on Friday.
However, Rangers do not expect the visa process to be completed until early next week, after which the 28-year-old can travel to Scotland.
They have therefore targeted the match against Aberdeen on 28 August for the midfielder's possible debut.